Carbon Steel Grades Supplier & Manufacturer - Carbon steel is one of the most widely used engineering materials, covering a full range of low carbon steel, medium carbon steel, and high carbon steel grades. Common international standards include ASTM A36, ASTM A283, ASTM A516 Gr 60/70, ASTM A106 Gr B, ASTM A53 Gr B, AISI 1010, 1018, 1020, 1045, 1060, 1095, EN S235JR, S275JR, S355JR, EN C15, C22, C45, C60, P265GH, P355GH, JIS SS400, SPCC, S20C, S45C, S55C, SK95, and GB Q195, Q235B, Q275, Q345R, 20, 45, 65, 75 steel. These carbon steel grades are available in plate, sheet, coil, strip, pipe, tube, bar, rod, wire, angle, channel, and beam forms, and are widely applied in structural construction, pressure vessels, boilers, oil & gas pipelines, mechanical machining, automotive components, forging, and general fabrication. With excellent weldability, machinability, strength, and cost efficiency, carbon steel remains the preferred material for global infrastructure, industrial manufacturing, and energy projects.
Low Carbon Steel (Mild Steel)
| Standard | Grade | C | Mn | Si | P (max) | S (max) |
|---|---|---|---|---|---|---|
| ASTM / AISI | 1010 | 0.08–0.13 | 0.30–0.60 | ≤0.30 | 0.040 | 0.050 |
| EN | DC01 | ≤0.12 | ≤0.60 | ≤0.40 | 0.045 | 0.045 |
| JIS | SPCC | ≤0.15 | ≤0.60 | ≤0.10 | 0.100 | 0.035 |
| GB | Q195 | ≤0.12 | 0.25–0.60 | ≤0.30 | 0.045 | 0.050 |
| ASTM | A36 | ≤0.26 | 0.80–1.20 | ≤0.40 | 0.040 | 0.050 |
| EN | S235JR | ≤0.17 | ≤1.40 | ≤0.50 | 0.045 | 0.045 |
| GB | Q235B | ≤0.22 | 0.30–0.70 | ≤0.30 | 0.045 | 0.045 |
Medium Carbon Steel
| Standard | Grade | C | Mn | Si | P (max) | S (max) |
|---|---|---|---|---|---|---|
| AISI | 1020 | 0.18–0.23 | 0.30–0.60 | ≤0.30 | 0.040 | 0.050 |
| EN | C22 | 0.17–0.24 | 0.40–0.70 | ≤0.40 | 0.045 | 0.045 |
| JIS | S20C | 0.18–0.23 | 0.30–0.60 | 0.15–0.35 | 0.030 | 0.035 |
| GB | 20 | 0.17–0.24 | 0.35–0.65 | 0.17–0.37 | 0.035 | 0.035 |
| AISI | 1045 | 0.43–0.50 | 0.60–0.90 | ≤0.30 | 0.040 | 0.050 |
| EN | C45 | 0.42–0.50 | 0.50–0.80 | ≤0.40 | 0.045 | 0.045 |
| JIS | S45C | 0.42–0.48 | 0.60–0.90 | 0.15–0.35 | 0.030 | 0.035 |
| GB | 45 | 0.42–0.50 | 0.50–0.80 | 0.17–0.37 | 0.035 | 0.035 |
High Carbon Steel
| Standard | Grade | C | Mn | Si | P (max) | S (max) |
|---|---|---|---|---|---|---|
| AISI | 1060 | 0.55–0.65 | 0.60–0.90 | ≤0.30 | 0.040 | 0.050 |
| EN | C60 | 0.57–0.65 | 0.60–0.90 | ≤0.40 | 0.045 | 0.045 |
| JIS | S60C | 0.57–0.63 | 0.60–0.90 | 0.15–0.35 | 0.030 | 0.035 |
| GB | 60 | 0.57–0.65 | 0.60–0.90 | 0.17–0.37 | 0.035 | 0.035 |
| AISI | 1095 | 0.90–1.03 | 0.30–0.50 | ≤0.30 | 0.040 | 0.050 |
| EN | C95 | 0.90–1.00 | 0.30–0.50 | ≤0.40 | 0.045 | 0.045 |
| JIS | SK95 | 0.90–1.00 | 0.30–0.50 | ≤0.35 | 0.030 | 0.035 |
| GB | 95 | 0.90–1.00 | 0.30–0.50 | 0.17–0.37 | 0.035 | 0.035 |
Pressure Vessel & Boiler Carbon Steel
| Standard | Grade | C | Mn | Si | P (max) | S (max) |
|---|---|---|---|---|---|---|
| ASTM | A516 Gr 70 | ≤0.28 | 0.85–1.20 | 0.15–0.40 | 0.035 | 0.035 |
| EN | P355GH | ≤0.20 | 1.00–1.70 | ≤0.50 | 0.025 | 0.015 |
| GB | Q345R | ≤0.20 | 1.00–1.60 | 0.15–0.50 | 0.025 | 0.015 |
Technical Notes
Values are typical specification limits, not actual mill test results
Final chemistry may vary by product form (plate, pipe, bar)
Always confirm with Mill Test Certificate (MTC / EN 10204 3.1)
Some standards allow micro-alloying (Nb, V, Ti) for grain refinement
